If possible, I would suggest taking them out now and keeping them at home until next year and trying to get them at least into first grade with subject acceleration as required.

It is GREAT that they have each other - it means they have someone who gets them! If they have dissatisfaction now, please don't leave it, that age for boys is tricky IMO and that is the age where we had intense issues in the only gifted school in our country, who claimed the exact same things you are saying.

Mom to 3 gorgeous boys: Aiden (8), Nathan (7) and Dylan (4)